Brother S-7250A Instruction Manual

INSTRUCTION MANUAL

S-7250A

Please read this manual before using the machine. Please keep this manual within easy reach for quick reference.

SINGLE NEEDLE DIRECT DRIVE LOCK STITCHER WITH ELECTRONIC FEEDING SYSTEM AND THREAD TRIMMER

Thank you very much for buying a BROTHER sewing machine. Before using your new machine, please read the safety instructions and the explanations given in the instruction manual.

With industrial sewing machines, it is normal to carry out work while positioned directly in front of moving parts such as the needle and thread take-up, and consequently there is always a danger of injury that can be caused by these parts. Follow the instructions from training personnel and instructors regarding safe and correct operation before operating the machine so that you will know how to use it correctly.

S-7250A

SAFETY INSTRUCTIONS

[1] Safety indications and their meanings

This instruction manual and the indications and symbols that are used on the machine itself are provided in order to ensure safe operation of this machine and to prevent accidents and injury to yourself or other people. The meanings of these indications and symbols are given below.

Indications

DANGER

CAUTION

Symbols

WARNING

· · · · ·

This symbol ( ) indicates something that you should be careful of. The picture inside the triangle indicates the nature of the caution that must be taken. (For example, the symbol at left means “beware of injury”.)

This symbol ( ) indicates something that you must not do.

This symbol ( ) indicates something that you must do. The picture inside the circle indicates the

nature of the thing that must be done. (For example, the symbol at left means “you must make the ground connection”.)

The instructions which follow this term indicate situations where failure to follow the instructions will result in death or serious injury.

The instructions which follow this term indicate situations where failure to follow the instructions could result in death or serious injury.

The instructions which follow this term indicate situations where failure to follow the instructions may result in minor or moderate injury.

S-7250A

[2] Notes on safety

Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet before opening the cover of the control box. Touching areas where high voltages are present can result in severe injury.

Do not allow any liquids to get onto this sewing machine, otherwise fire, electric shocks or operating problems may occur.

If any liquid gets inside the sewing machine (machine head or control box), immediately turn off the power and disconnect the power plug from the electrical outlet, and then contact the place of purchase or a qualified technician.

DANGER

WARNING

CAUTION

Environmental requirements

Use the sewing machine in an area which is free from sources of strong electrical noise such as electrical line noise or static electric noise. Sources of strong electrical noise may cause problems with correct operation.

Any fluctuations in the power supply voltage should be within 10% of the rated voltage for the machine. Voltage fluctuations which are greater than this may cause problems with correct operation.

The power supply capacity should be greater than the requirements for the sewing machine's power consumption. Insufficient power supply capacity may cause problems with correct operation.

Machine installation should only be carried out by a qualified technician.

Contact your Brother dealer or a qualified electrician for any electrical work that may need to be done.

The sewing machine weighs approximately 35 kg (77lb). The installation should be carried out by two or more people.

Do not connect the power cord until installation is complete. The machine may operate if the treadle is depressed by mistake, which could result in injury.

Turn off the power switch before inserting or removing the plug, otherwise damage to the control box could result.

Be sure to connect the ground. If the ground connection is not secure, you run a high risk of receiving a serious electric shock, and problems with correct operation may also occur.

When securing the cords, do not bend the cords excessively or fasten them too hard with staples, otherwise there is the danger that fire or electric shocks could occur.

Installation

The ambient temperature should be within the range of 5C to 35C during use. Temperatures which are lower or higher than this may cause problems with correct operation.

The relative humidity should be within the range of 45% to 85% during use, and no dew formation should occur in any devices. Excessively dry or humid environments and dew formation may cause problems with correct operation.

In the event of an electrical storm, turn off the power and disconnect the power cord from the wall outlet. Lightning may cause problems with correct operation.

Do not connect anything to the USB port other than the USB memory. If this is not observed, problems with operation may result.

If using a work table which has casters, the casters should be secured in such a way so that they cannot move.

Secure the table so that it will not move when tilting back the machine head. If the table moves, it may crush your feet or cause other injuries.

Use both hands to hold the machine head when tilting it back or returning it to its original position. If only one hand is used, the weight of the machine head may cause your hand to slip, and your hand may get caught.

Be sure to wear protective goggles and gloves when handling the lubricating oil and grease, so that they do not get into your eyes or onto your skin, otherwise inflammation can result. Furthermore, do not drink the oil or eat the grease under any circumstances, as they can cause vomiting and diarrhea. Keep the oil out of the reach of children.

S-7250A

This sewing machine should only be used by operators who have received the necessary training in safe use beforehand.

The sewing machine should not be used for any applications other than sewing.

Be sure to wear protective goggles when using the machine. If goggles are not worn, there is the danger that if a needle breaks, parts of the broken needle may enter your eyes and injury may result.

Turn off the power switch at the following times. The machine may operate if the treadle is depressed by mistake, which could result in injury.

 When threading the needle  When replacing the bobbin and needle  When not using the machine and when leaving

the machine unattended

If using a work table which has casters, the casters should be secured in such a way so that they cannot move.

CAUTION

Sewing

Attach all safety devices before using the sewing machine. If the machine is used without these devices attached, injury may result.

Do not touch any of the moving parts or press any objects against the machine while sewing, as this may result in personal injury or damage to the machine.

Secure the table so that it will not move when tilting back the machine head. If the table moves, it may crush your feet or cause other injuries.

If an error occurs in machine operation, or if abnormal noises or smells are noticed, immediately turn off the power switch. Then contact your nearest Brother dealer or a qualified technician.

If the machine develops a problem, contact your nearest Brother dealer or a qualified technician.

Cleaning

Turn off the power switch before carrying out cleaning. The machine may operate if the treadle is depressed by mistake, which could result in injury.

Secure the table so that it will not move when tilting back the machine head. If the table moves, it may crush your feet or cause other injuries.

Maintenance and inspection

Maintenance and inspection of the sewing machine should only be carried out by a qualified technician.

Ask your Brother dealer or a qualified electrician to carry out any maintenance and inspection of the electrical system.

Turn off the power switch and disconnect the power cord from the wall outlet at the following times, otherwise the machine may operate if the treadle is depressed by mistake, which could result in injury.

 When carrying out inspection, adjustment and

maintenance

 When replacing consumable parts such as the

rotary hook and knife

Always be sure to turn off the power switch and then wait one minute before opening the pulley cover. If you touch the surface of the motor, it may cause burns.

If the power switch needs to be left on when carrying out some adjustment, make sure that you switch the sewing machine to maintenance mode. Pay careful attention to safety.

Secure the table so that it will not move when tilting back the machine head. If the table moves, it may crush your feet or cause other injuries.

When replacing parts and installing optional accessories, be sure to use only genuine Brother parts. Brother will not be held responsible for any accidents or problems resulting from the use of non-genuine parts.

If any safety devices have been removed, be absolutely sure to re-install them to their original positions and check that they operate correctly before using the machine.

To prevent accidents and problems, do not modify the machine yourself. Brother will not be held responsible for any accidents or problems resulting from modifications made to the machine.

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iii

[3] Warning labels

The following warning labels appear on the sewing machine.

Please follow the instructions on the labels at all times when using the machine. If the labels have been removed or are difficult to read, please contact your nearest Brother dealer.

* Safety devices: (A) Finger guard

Touching areas where high voltages are present can result in severe injury. Turn off the power before opening the cover.

(B) Thread take-up cover (C) Motor cover (D) Pulse motor cover

Be careful not to get your hands caught when returning the machine head to its original position after it has been tilted.

Be careful to avoid injury from the moving thread take-up.

High temperature warning display

Be sure to connect the ground. If the ground connection is not secure, you run a high risk of receiving a serious electric shock, and problems with correct operation may also occur.

Direction of operation

Do not hold. Problems with operation or injury may occur.

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Do not place your hands inside the bottom cover. Problems with operation or injury may occur.

Transformer box (100V/110V/380V/400V)

Oil tank

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1460D

1. MACHINE SPECIFICATIONS ............... 1

2. INSTALLATION ..................................... 2

2-1. Table processing diagram ................................ 3

2-2. Installation ........................................................ 3

2-3. Lubrication ........................................................ 6

2-4. Connecting the cords ........................................ 7

2-4-1. Connecting the cords ............................. 7

2-4-2. Other cords ............................................ 9

3. USING THE OPERATION PANEL

(BASIC OPERATIONS) ........................ 13

3-1. Names and functions ...................................... 13

3-2. Sewing start and end backtack stitches ......... 15

3-3. Sewing continuous backtack stitches ............. 16

4. USING THE OPERATION PANEL

(ADVANCED OPERATIONS) .............. 17

4-1. Sewing pitch setting method .......................... 17

4-2. Switching the 4-digit display ........................... 18

4-3. Setting the sewing speed ............................... 18

4-3-1. Setting the maximum sewing speed .... 18

4-3-2. Backtack sewing speed setting

method ................................................. 19

4-4. Setting the counters ........................................ 20

4-4-1. Lower thread counter ........................... 20

4-4-2. Production counter ............................... 21

4-4-3. Needle replacement counter ................ 22

4-5. Sewing locus setting meth .............................. 23

4-6. Setting basic functions .................................... 24

4-6-1. Changing the needle stop position ...... 25

4-6-2. Thread trimming disable ...................... 26

4-6-3. Thread wiping ...................................... 27

4-6-4. Correction sewing ................................ 28

4-6-5. Slow start ............................................. 29

4-6-6. Setting the illumination LED light ......... 30

4-6-7.

Setting lower thread counter operation

4-6-8. Prev. thread away ................................ 32

4-6-9. Short trailing thread .............................. 33

4-6-10. Correction sewing function (1) ........... 34

4-6-11. Correction sewing function (2) ........... 35

4-7. Memory switch setting method ....................... 36

4-8. List of memory switch settings ....................... 37

4-9. Reading and writing data using USB media ... 41

4-10. Resetting all settings to their defaults ........... 42

4-11. Hand switch .................................................. 43

4-11-1. Hand switch function setting .............. 45

4-11-2. 2nd correction pitch setting ................ 46

4-11-3. 2nd pitch setting ................................. 46

. 31

4-11-4. Menu numbers for setting functions for

the hand switch .................................. 46

5. CLEANING ........................................... 47

6. STANDARD ADJUSTMENTS .............. 48

6-1. Arm thread guide R ......................................... 48

6-2. Presser foot height .......................................... 49

6-3. Adjusting the feed dog height ......................... 50

6-4. Adjusting the feed dog angle .......................... 51

6-5. Adjusting the needle bar height ...................... 51

6-6. Adjusting the needle and feed mechanism

timing ............................................................... 52

6-7. Needle and rotary hook timing ........................ 53

6-8. ADJUSTING THE ROTARY HOOK

LUBRICATION AMOUNT ............................... 54

6-9. Thread trimming (Other than short trailing thread

specifications) ................................................. 55

6-10. Thread trimming (Short trailing thread

specifications) ............................................... 58

7. TROUBLESHOOTING .......................... 61

7-1. Sewing ............................................................ 61

7-2. Error code displays ......................................... 68

8. 7-SEGMENT DISPLAY ......................... 72

S-7250A

1. MACHINE SPECIFICATIONS

Thread wiper

1424D

Specifications Short trailing thread specifications

Use For medium-weight materials For heavy-weight materials Max. sewing speed * Standard feed locus Sewing speed at the time of shipment 4,000 sti/min Backtack sewing speed * Standard feed locus

Max. stitch length 5 mm 5 mm (can be set to 7 mm) Presser foot height Feed dog height 0.8 mm 1.2 mm Needle (DB×1, DP×5) #11 - #18 #19 - #22 Motor AC servo motor Control circuit Microprocessor

Lifting lever 6 mm Knee lifter 13 mm

Stitch length 2.0 mm or less/

Automatic 150 (*1) - 3000 sti/min, Manual 150 (*1) - 4000 sti/min*

3 5

5,000 sti/min

(*1) Inching setting speed

3 4

4,000 sti/min

S-7250A

2. INSTALLATION

CAUTION

Machine installation should only be carried out by a qualified technician.

Contact your Brother dealer or a qualified electrician for any electrical work that may need to be done.

The sewing machine weighs approximately 35 kg (77lb). The installation should be carried out by two or more people.

Do not connect the power cord until installation is complete. The machine may operate if the treadle is depressed by mistake, which could result in injury.

About the machine set-up location

・ Do not set up this sewing machine near other equipment such as

televisions, radios or cordless telephones, otherwise such equipment may be affected by electronic interference from the sewing machine.

・ The sewing machine should be plugged directly into an AC wall

outlet. Operation problems may result if extension cords are used.

2. INSTALLATION

Secure the table so that it will not move when tilting back the machine head. If the table moves, it may crush your feet or cause other injuries.

0475D

Carrying the machine

・ The sewing machine should be carried by the arm and the motor

cover by two people as shown in the illustration.

* Do not hold by any part other than the motor cover. If this is not

observed, it may result in damage to the sewing machine.

Tilting back the machine head

・ Hold section (A) with your foot so that the table does not move,

and then push the arm with both hands to tilt back the machine head.

Returning the machine head to the upright position

1. Clear away any tools, etc. which may be near the table holes.

2. While holding the face plate with your left hand, gently return the machine head to the upright position with your right hand.

1341D

1342D

1343D

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2. INSTALLATION

2-1. Table processing diagram

・ The top of the table should be 40 mm in thickness and should be strong enough to hold the weight and withstand the

vibration of the sewing machine.

・ Drill holes as indicated in the illustration below.

Head rest hole

Cotton stand hole

Cord hole

Control box mounting hole

1412D

2-2. Installation

1. Control box + Oil pan

(1) Control box (2) Bolts [4 pcs] (3) Nuts [4 pcs] (4) Spring washers [4 pcs] (5) Washers [4 pcs]

2. Connecting rod

(6) Connecting rod (7) Nut

S-7250A

2. INSTALLATION

3. Rubber cushions

(1) Rubber cushions [2 pcs]

1414D

4. Machine head

(1) Hinges [2 pcs] (2) Machine head (3) Head rest

NOTE:

・ Bind the cords together and pass

them through the cord hole.

・ Tap the head rest (3) securely into

the table hole.

・ If the head rest (3) is not pushed in

as far as it will go, the machine head will not be sufficiently stable when it is tilted back.

1415D

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2. INSTALLATION

10mm

1416D

Within 13 mm

1417D

5. Knee lifter plate

1. Turn the machine pulley so that the feed dog is below the top of the needle plate.

2. Lower the presser foot (1) by using the lifting lever (2).

3. Loosen the nut (3).

4. Turn the screw (5) to adjust so that the amount of play in the knee lifter plate (4) is approximately 10 mm.

5. After adjustment is completed, securely tighten the nut (3).

6. Loosen the nut (6).

7. Turn the adjusting screw (8) to adjust so that the presser foot (7) is at the desired position within a distance of 13 mm from the needle plate when the knee lifter plate is fully pressed.

8. After adjustment is completed, securely tighten the nut (6).

S-7250A

2-3. Lubrication

Do not connect the power cord until lubrication has been completed, otherwise the machine may operate if the treadle is depressed by mistake, which could result in injury.

Be sure to wear protective goggles and gloves when handling the lubricating oil, so that it does not get into your eyes or onto your skin. If care is not taken, inflammation can result. Furthermore, do not drink the lubricating oil. Diarrhea or vomiting may result. Keep the oil out of the reach of children.

When cutting the nozzle of the oil tank, hold the base of the nozzle securely.

If you hold the end of the nozzle, injury from the scissors may result.

2. INSTALLATION

CAUTION

The sewing machine should always be lubricated and the oil supply replenished before it is used for the first time, and also after long periods of non-use.

1. Hold the base of the nozzle of the accessory oil tank (1), and use scissors to cut about half-way along the straight section (A) of the nozzle.

2. Loosen and remove the nozzle, and then remove the seal (2).

3. Tighten the nozzle.

4. Tilt back the machine head.

5. Remove the rubber cap (3), and pour lubricating oil into the oil cover (4) until it reaches the upper reference line (5).

6. Replace the rubber cap (3).

7. Return the machine head to its original position.

NOTE:

When the machine head is tilted back at times such as the following, lubricating oil may leak out from the oil cover (4).

1) If lubricating oil is added until the oil level goes above the upper reference line (5) on the oil cover (4).

If the oil level drops below the lower reference line (6) on the oil cover (4), be sure to replenish the oil.

Upper

reference line

Lower

reference line

1418D

S-7250A

2. INSTALLATION

2-4. Connecting the cords

Contact your Brother dealer or a qualified electrician for any electrical work that may need to be done.

Do not connect the power cord until all cords have been connected. The machine may operate if the treadle is depressed by mistake, which could result in injury.

When securing the cords, do not bend the cords excessively or fasten them too hard with staples, otherwise there is the danger that fire or electric shocks could occur.

Be sure to connect the ground. If the ground connection is not secure, you run a high risk of receiving a serious electric shock, and problems with correct operation may also occur.

2-4-1. Connecting the cords

Align the flat edges

CAUTION

Ground symbol

1419D

1. Cor ds ( 1)

(1) Solenoid connector 14-pin (2) Sewing machine motor encoder

connector 10-pin

(3) Feed motor encoder connector

6-pin (4) Operation panel connector 5-pin (5) Power connector 3-pin

1. Secure the cords to the control box

with the black band (6).

NOTE:

For Europe specifications, Americas 220 V specifications and 100 V/400 V system specifications, refer to “2-4-2. Other cords”.

2. Ground wire

(1) Ground wire (2)

Screw

(3) Power cord

1. Attach an appropriate plug to the

power cord (3). (The green and yellow wire is the ground wire.)

2. Insert the power plug into a

properly-grounded electrical outlet.

Green and yellow wire (ground wire)

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1420D

NOTE:

・ Make sure that the ground

connections are secure in order to ensure safety.

・ For Europe specifications, Americas

220 V specifications and 100 V/400 V system specifications, refer to “2-4-2. Other cords”.

2. INSTALLATION

3. Cords (2)

(1) Machine motor connector 4-pin (2) Feed motor connector 6-pin

Lower the tab (3).

Push in securely until the tabs (3) engage.

1421D

S-7250A

2. INSTALLATION

2-4-2. Other cords

DANGER

For Europe specifications, Americas 220 V specifications and 100 V/400 V system specifications, connect the cords according to the respective specifications.

<Europe specifications> (1) Filter box (2) Screws [4 pcs] (3) Connector (4) CE bush plate (5) Screws [2 pcs] (6) CE D cord cover (7) Screws [2 pcs] (8) Staples [4 pcs] (9) Power cord

1. Attach an appropriate plug to the

power cord (9). (The green and yellow wire is the ground wire.)

2. Insert the power plug into a

properly-grounded electrical outlet.

NOTE:

・ Take care when tapping in the

staples (8) to make sure that they do not pierce the cords.

・ Do not use extension cords,

otherwise machine operation problems may result.

Leg

Control box

Green and yellow wire (ground wire)

1480D

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For Europe specifications, Americas 220 V specifications and 100 V/400 V system specifications, connect the cords according to the respective specifications.

(1) Power switch (2) Screws [2 pcs]

2. INSTALLATION

Operator

4145M

S-7250A

2. INSTALLATION

(3) Transformer box (4) Transformer box plates [2 pcs] (5) Screws [with washer] [4 pcs] (6) Power supply connector 3-pin (7) Staples [5 pcs] (8) Cord clamps [2 pcs] (9) Power cord

1. Attach an appropriate plug to the

power cord (10). (The green and yellow wire is the ground wire.)

2. Insert the power plug into a

properly-grounded electrical outlet.

NOTE:

・ Take care when tapping in the

staples (7) to make sure that they do not pierce the cords.

・ Do not use extension cords,

otherwise machine operation problems may result.

Green and yellow wire (ground wire)

1479D

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2. INSTALLATION

(1) Power switch (2) Screws [2 pcs]

Operator

4145M

(3) Power supply connector 3-pin (4) Power cord (5) Staples [5 pcs]

1. Attach an appropriate plug to the

power cord (4). (The green and yellow wire is the ground wire.)

2. Insert the power plug into a

properly-grounded electrical outlet.

Green and yellow wire (ground wire)

NOTE:

・ Take care when tapping in the

staples (5) to make sure that they do not pierce the cords.

・ Do not use extension cords,

otherwise machine operation problems may result.

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1423D

3. USING THE OPERATION PANEL (BASIC OPERATIONS)

USING THE OPERATION PANEL (BASIC OPERATIONS)

3-1. Names and functions

・ The operation panel keys cannot be operated while sewing is in progress.

Select the keys and set the number of stitches before starting sewing.

・ In the case of keys with indicators, the indicator illuminates when that function is operating, and the indicator switches off

when the key is pressed once more.

Power indicator

Stitch No. indicator

Speed indicator

Counter indicator

Locus indicator

Program indicator

1425D

The power indicator illuminates when the power switch is turned on.

(1) 3-digit display

Displays the sewing pitch.

(2) Pitch setting keys

(3) 4-digit display

(4) SEL (Select) key

Use these keys to set the sewing pitch. ・When the - key is pressed, the setting decreases in steps of 0.05 within a range of 0.05 to

5.00.

When the + key is pressed, the setting increases in steps of 0.05 within a range of 0.05 to

・

5.00.

・ When start backtack stitches are being displayed, the indicator of the start backtack key

(6) will illuminate, and the number of A stitches will appear in the A column and the number of B stitches will appear in the B column.

・ When end backtack stitches are being displayed, the indicator of the end backtack key

(7) will illuminate, and the number of C stitches will appear in the C column and the number of D stitches will appear in the D column.

・ When continuous backtack stitches are displayed, the indicator of the continuous

backtack key (8) will illuminate, and the number of A, B, C and D stitches will appear in order starting from the left column of the display.

・ The five indicators on the right side of the window show which value is appearing in the

4-digit display. The 4-digit display shows the number of stitches, speed, counter, locus and program. When the number of stitches is being displayed, the ABCD indicator (Stitch No. indicator) will illuminate.

The value in the 4-digit display (3) can be changed each time this key is pressed.

(5) Setting keys

These keys are used to set the number of backtack stitches for A, B, C and D.

・ When the key is pressed, the setting increases from 0 up to 9. ・ If you press the key once more when “9” is displayed, the value will return to “0”. ・ If you hold down the key, the value will change continuously.

1426D

1427D

1428D

1340D

1429D

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(6) Start backtack key

(7) End backtack key

(8) Continuous backtack key

(9) Thread trimming disable/F1 key

(10) Slow start/F2 key

(11) Half stitch key

3. USING THE OPERATION PANEL (BASIC OPERATIONS)

Power indicator

Stitch No. indicator

Speed indicator

Counter indicator

Locus indicator

Program indicator

1425D

When this key is pressed so that the indicator illuminates, the number of start backtack stitches (0 - 9) in the A and B columns of the display are sewn.

1323D

When this key is pressed so that the indicator illuminates, the number of end backtack stitches (0 to 9) in the C and D columns of the display are sewn. When the treadle is depressed backward, the end backtack stitches are sewn and then the thread is trimmed. If the treadle has not yet been depressed backward, the end backtack function can be set to ON, the number of stitches can be changed and the function can be set back to OFF.

1325D

When this key is pressed so that the indicator illuminates, the number of backtack stitches (0 to 9) in the A, B, C and D columns of the display are sewn continuously. After the sewing machine sews a full cycle of stitches set by A, B, C and D, the thread is trimmed.

1327D

When this key is pressed so that the indicator illuminates, the sewing machine stops in the needle up position without thread trimming being carried out even if the treadle is depressed backward.

1330D

When this key is pressed so that the indicator illuminates, sewing is carried out at 700 sti/min for the first two stitches at the next sewing start after thread trimming. After this, the sewing speed corresponds to the treadle depression amount.

1332D

When the sewing machine is stopped, the needle bar can be moved up and down by pressing this key.

1329D

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3. USING THE OPERATION PANEL (BASIC OPERATIONS)

3-2. Sewing start and end backtack stitches

Setting start backtack stitches

Setting end backtack stitches

0841M

Press the key so that the indicator and the keys

illuminate.

Press the key to set the number of stitches for A and B.

For example, to select 3 stitches and 4 stitches: A-3, B-4

Press the key so that the indicator and the keys

illuminate.

1350D

Press the key to set the number of stitches for C and D.

For example, to select 3 stitches and 2 stitches: C-3, D-2

Start backtacking is carried out. After it has finished, normal sewing continues for as long as the treadle remains depressed.

NOTE:

If the treadle is returned to the neutral position, the sewing machine will continue operating until the set number of start backtack stitches has been sewn.

End backtacking is carried out. After it has finished, the thread is trimmed automatically and the sewing machine stops in the needle up position.

NOTE:

・ If the treadle is depressed backward before sewing of the set number of start backtack

stitches is complete, end backtacking will not be carried out.

・ If thread trimming lock is set, the sewing machine will stop in the needle up position without

thread trimming being carried out.

1351D

2159M

2160M

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3. USING THE OPERATION PANEL (BASIC OPERATIONS)

3-3. Sewing continuous backtack stitches

Sewing continuous backtack stitches

3655M

Press the key so that the indicator and the keys

illuminate.

Press the key to set the number of stitches for A, B, C and D.

For example, to select 4 stitches for A and 5 stitches for B: A-4, B-5 To select 5 stitches for C and 4 stitches for D: C-5, D-4

If the treadle is simply depressed continuously, the number of stitches set for A, B, C and D will be sewn in a single cycle, the thread will be trimmed automatically and then the needle bar will stop in the needle up position.

NOTE:

・ If the treadle is returned to the neutral position while continuous backtacking is being carried

out, the sewing machine will stop at the point where the treadle returns to the neutral position. If the treadle is depressed again, operation will resume from the point where it was interrupted.

・ If thread trimming lock is set, the sewing machine will stop in the needle up position without

thread trimming being carried out.

If "-" is set as the number of stitches for C, the number of stitches set by AB can be sewn D times. For example, if D=3: ABA If D=6: ABABAB

1352D

2159M

S-7250A

+ 57 hidden pages

Brother S-7250A Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SAFETY INSTRUCTIONS

[1] Safety indications and their meanings

[2] Notes on safety

[3] Warning labels

CONTENTS

1. MACHINE SPECIFICATIONS

2. INSTALLATION

2-1. Table processing diagram

2-2. Installation

2-3. Lubrication

2-4. Connecting the cords

2-4-1. Connecting the cords

2-4-2. Other cords

3. USING THE OPERATION PANEL (BASIC OPERATIONS)

3-1. Names and functions

3-2. Sewing start and end backtack stitches

3-3. Sewing continuous backtack stitches